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<title>Data preparation : Edit</title>

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  <p><b>EDIT</b></p>

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<p>This feature allows you to modify any existing DataSet in order to 

  add new attributes, to correct some errors, etc.</p>

<p>Once the DataSet file is loaded (always in KEEL's format) by pressing the 'Browser' button its content appears 

  on the table. Using the table view facilitates navigation across the content 

  of the file. Using the table, its cells and the buttons situated over it 

  you can perform some operations:</p>

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  <li><i><b>Modify the cell content</b></i>: you only have to write the new value, and if it is 

    valid, the cell content is modified. Otherwise an error dialog is shown.</li>

  <li><i><b>Change the rank values</b></i>: only if the attribute selected is &quot;Integer&quot; 

    or &quot;Real&quot; you can write the new rank values.</li>

  <li><i><b>Change nominal values</b></i>: only if the attribute selected is nominal. Using 

    the buttons '+' and '-' and the list, you can add or remove the values allowed for the 

    attribute.</li>

  <li><i><b>Change attribute 'function'</b></i>: you can modify the attribute 'function' by specifying if it is &quot;input&quot; 

    or &quot;output&quot;.</li>

  <li><i><b>Delete a row</b></i>: pressing the button <img src="imag/botonBorrarFila.jpg">, an instance is removed from DataSet.</li>

  <li><i><b>Delete a colum</b></i>: pressing the button <img src="imag/botonBorrarCol.jpg">, the attribute in the column 

    selected is removed from all the instances.</li>

  <li><i><b>Insert a row</b></i>: you can add an instance to the DataSet. To do this, you only have to press 

    the button <img src="imag/botonInsertarFila.jpg"> and a new row is added to the bottom of the table. The row has 

    all its cells in blank.</li>

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<p align="center"><img src="imag/data_edit.jpg"></p>

<p>When you have made all the changes, you can save them to a file pressing the 

  &quot;Save&quot; button.<br></p>

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